Which trio represents the three development-focused research designs?

Which trio represents the three development-focused research designs?

• A. Experimental, Correlational, and Case Study
• B. Ethnographic, Phenomenological, and Grounded Theory
• C. Meta-analysis, Systematic Review, and Narrative Review
• D. Longitudinal, Cross-sectional, and Sequential

Answer: (D)

Developmental research centers on how people change over time and across ages. Longitudinal studies follow the same individuals across multiple time points, showing how each person develops over years. Cross-sectional designs compare groups of people at different ages at one moment, highlighting age-related differences. Sequential designs blend these approaches by tracking several age cohorts over time, allowing researchers to separate effects of aging from cohort or time-period influences. Together, these three designs are specifically used to study development as it unfolds. Other options represent different research strategies: one trio focuses on manipulating variables or observing relationships without emphasizing developmental change over time; another group is about in-depth qualitative inquiry into experiences; and the last set consists of methods for summarizing existing research rather than collecting new developmental data. Thus, longitudinal, cross-sectional, and sequential best fit development-focused research designs.

Developmental research centers on how people change over time and across ages. Longitudinal studies follow the same individuals across multiple time points, showing how each person develops over years. Cross-sectional designs compare groups of people at different ages at one moment, highlighting age-related differences. Sequential designs blend these approaches by tracking several age cohorts over time, allowing researchers to separate effects of aging from cohort or time-period influences. Together, these three designs are specifically used to study development as it unfolds.

Other options represent different research strategies: one trio focuses on manipulating variables or observing relationships without emphasizing developmental change over time; another group is about in-depth qualitative inquiry into experiences; and the last set consists of methods for summarizing existing research rather than collecting new developmental data. Thus, longitudinal, cross-sectional, and sequential best fit development-focused research designs.